Question

Find the number of sec in an hr, a day, a week, a month and a year. Express your answers in
scientific notation​

Answer 1

1 year consists of 365 days. 1 day has 24 hours, each hour has 60 minutes and each minute has 60 seconds.

This gives the number of Seconds in an hour as 60 × 60 = 3600 and the number of Seconds in a day as 24 × 3600 = 86400

The number of Seconds in 365 days is 86400 × 365 = 31536000 seconds

There are 31536000 seconds in a year

Hope! This will help you ✅✅

Answer 2

Answer:

see below

Step-by-step explanation:

1hr = 60 min

1min = 60 sec

thus, 1 hr = 60*60 = 3.6 * 10³ sec

1hr = 3.6 * 10³ sec

1 day = 24*3.6*10³ = 8.64*10^5 sec

1 day = 8.64*10^5 sec

1 week = 7 days = 7*8.64*10^5 sec = 6.048*10^6 sec

1week = 6.048*10^6 sec

1 month = 30 day = 30* 6.048*10^6 sec

1 month = 2.592*10^7 sec

1year = 365 days = 365*8.64*10^5 s = 3.1536*10^8 s

1 year = 3.1536*10^8 sec